Pyrotechnic



Oct. '11, 192.7. A

s. G. STEVENS PYROTECHNIC Filed March 30, 1925 Patented 0a. 11, 1927.

PATENT OFFICE.

UNITED STATES;

rYnorncnnrc.

Application filed March 30, 1925. Serial No. 19,353.

This invention relates to pyrotechnics and has special reference tomeans for producing pyrotechnical display in an open fire, and, to thisend, the accompanying illustration represents one of the embodiments ofmy invention in a yule log.

The principal object of the invention is to produce novel means wherebythe aesthetic effect of pyrotechny may be prolonged in an open fire.

Another object of the invention is to provide means whereby varied formsof display may be successively accomplished during the burning of a logor stick.

Other objects and advantages will appear in the further description ofthe invention.

Referring now to the accompanying drawing, forming part of thisapplication, and in which like reference characters indicate like parts:

The illustration is a perspective View of a fragmental portion of a yulelog represent ing the invention.

1 represents a stick of wood having holes bored or drilled therein invarious directions such as indicated at 2, and the holes are preferablysubstantially filled with granular material illustrated at 3 havingcolorful properties during the burning thereof.

There are various combinations of chemicals with a granular vehicle forproducing different color effects when thrown in the fire. These howeverare invariably soon consumed and their pyrotechnic value quicklydestroyed, but where a piece of fuel is impregnated with such materialeither by boring holes therein and filling same with the displaysubstance, or otherwise, the pyrotechnic value is materiall lengthened.

It is readily seen that fiy boring the holes 2 in difierentdirections'and spaced longi tudinally of the fuel unit duringpractically the entire burning of the fuel benefits from the displaymaterial will be derived, and, in the event of a yule log being thevehicle for such display and as the custom is of saving portions of thelog from one yuletide to an-' other, colorful effects may be obtainedfrom the remnants of the past log when used to kindle the subsequentone, and in this manner effectively transfer the yuletide spirit as itwere from log to log.

At 4 in the accompanying drawing I have shown a somewhat enlarged holehaving a slightly different operable device therein, the

same in this instance representing a miniature Christmas tree 5 mountedupon an expansive helical spring 6 preferably fastened to the bottom ofthe hole 4. This hole is covered with say a paper wadding or cork 7which when burning away will free thev be made of different thicknessesso as to not burn simultaneously, and that various forms ofpyrotechnical substances or objects may be concealed w1th1n theapertures thus formed in the fuel so as to produce almost any desiredform of display in the fire for independent celebration, yuletidecelebration, or other special occasions.

While I have illustrated the embodiment of'the invention in connectionwith a wooden stick, it is apparent that the same may be accomplishedwith lumps of coal or other fuel if desired, and that where holes arefilled with the pyrotechnic material, such as illustrated at 8, theouter extremity of the hole is securely corked or plugged as at 8 andout off flush with the outer surface of the stick, so as to be asinconspicuous as possible.

It is found that forcibly plugging the holes in this manner when filledwith chemical substance produces internal pressure by hammering in ofthe plug or cork and has. a tendency to impregnate the wood to someextent adjacent the hole with the chemical and thus render it moreeffective during the burning of the entire stick.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is:

1. The combination with a unit of fuel having chambers therein, aconfined display element within the chambers, and means ghereby thedisplay element is released by eat.

2. The combination with a container subject to heat of individualchambers within the container, display means within the chambers andmeans released by heat for operating the display means.

3. The combination with a unit of fuel, of

'Q' a i 1,645,206

individual zones within said unit, each zone 5. A unit of fuel of theclass described carrying :pyrotechnic combustible material having incombinationtherewithp rotec'hnic v diiferent from that carriedbyianother zone. display means operable at a pre etermined 1 4. A unitof fuel of the class described time during the consumption of the fuel;6 having in combination therewith p rotechnic' In testimony whereof Ihereunto affix my display means and means opera le subsesignature. quentto the initial burning of the fuel for releasing the display means. y tGEQ STEVENS. V

